Simon b



S. B. HESS.

ELECTRIC SIGNALING SYSTEM.

APPLICATION FILED Nov. 27, I916.

Patented Dec. 9,1919.

alarm JNVE/V T011 Maw localized territory, hotel buildings, and the like.

I To all whom itmag concern: I

UNITED STATES PATENT OFFICE.

SIMON BzHESS, OF NEW YORK, N. Y.

Be it known that I, SIMON B. Hnss, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful Improvements in Electric Signaling Systems, of which the following is a specification.

The system disclosed .by this invention is particularly adapted for utilization as an alarm system for protecting, say, from fire,

Systems of this class are designed primarily to provide means for sounding an alarm or a plurality of alarms upon the occurrence of a predetermined circumstance, as for'example, an 'alarm or a plurality of alarms, of fire, sent from any one of a plurality of stations and giving'warning signals at one desired point or at .a plurality of desired points in a building or the like,

so as to Warn the occupants of the existence of a fire to the end that they may escape, or for the purpose of training the occupants of the building in the use of the most expeditious means of making their exitin case of fire or other catastrophe, or for the purpose of calling atire brigade to quarters, etc.

It is often desired to provide some means of selection by which it may be possible to' test'the different parts of the system or to have fire drills in parts of the building with out operating the entire system.

For example, in a hotel or hospital building, it may be inadvisable to alarm the occupants of the premises, except in case of actual necessity. In this case, the system should be so designed that the alarm receiving devices are divided in two groups, one group comprising those for the fire brigade, and the other group comprising those located on the different floors and intended to alarm the occupants of the premises, and the circuits should be so arranged that an alarm may be transmitted to the fire brigade only, calling-them to the scene of the alarm, then, if it is seen to be necessary to transmit an alarm to warn the occupants to escape, the system may be so adjusted that an alarm can be transmitted to all receiving devices in the system.

An object of this invention is to provide a system of the class described, in which the circuits may be arranged at any trans- Specification of Letters Patent.

.transmitting station,

.mitting mechanism at ELECTRIC SIGNALING SYSTEM.

mitting station so that .the transmitting mechanism at any station may cause opera- Patented Dec. 9, 1919. Application filed November 27, 1916. Serial No. 133,582.

tion of only a portion of the signal receiv- 1 mg devices when, for example, a drill of the fire brigade is desired without disturbing the occupants Another object. provide a system of the class described, in Wh1cl1 the circuits may be arranged at any either so that the transmitting mechanism at any station may of the building.

of this invention is to cause operation of only'a portion of the signal receiving devices, or so that the trans- I any station may cause operation of all of the signal receiving devices, when, for example, an actual fire occurs. v

Objects andaims of this invention more or less broad than those stated above, together with its inherent advantages, will be in part obvious and in part specifically referred to in the course of the following description of the elements, combinations of means, arrangements of parts, and applications of principles constituting this invention, and the scope of protection contemplated will appear from the claims. I attain these objects and aims in the present embodiment by means of the circuits, devices, apparatus, resistances, and sources of current supply illustrated. in the accompanying drawing, which is to be taken as part of these specifications, and constitutes a. diagrammatic disclosure of the said embodiment.

' In the accompanying drawing, E represents an electric generator connected to the mains 11 and12, and E represents an electric generator connected to the mains l2 and 13, main 12 being grounded at 14. The mains 11, 12, and 13 are intended to indicate the three feed wires of any typical three-wire direct current system. 23 is an electromagnet, the armature of which is arranged to so manipulate contact levers 25,.

maining in contact with stud 49. The reference numerals 51 represent single stroke bells.

Under normal conditions magnet 23 is energized to attract its armature, the following closed circuit being established :-from main 11, to junction 15, conductor 19 and resistance 20 therein, conductor 53 of the first bell loop, hereinafter called the alarm loop, the bells 51 in series therein, conductor 43 of the alarm loop, the selecting device studs 49 and switch arms 46 in series in conductor 43, resistance 44, junction 42, conductor 45 of the second bell loop, hereinafter called 'the drill loop, the selecting device switch arms 47 and studs 50 in series in conductor 45, conductor 52 of the drill loop, the bells 51 in seriestherein, point 24, lever 25, conductor 34 of the transmitting loop, transmitting mechanism 35, conductor 36, signaling levers 37 and 38 conductor 40 of the transmitting loop, magnet 23, conductor 55, conductor 21, to main 12. The winding of ma'gnet23 is so related to that of the magnets of the bells 51 that the current passing through the circuit just described is sufficient to cause magnet 23 toeffectively attract its armature while the bell magnets are unable even to retain their armatures in attracted position. While magnet 23 is itself a comparatively high resistance magnet, resistances 20 and 44 in series therewith assist in securing a minimum value for the normal current flow after the armature of magnet 23 has been moved to attracted position. l l

Upon the operation of any transmitting mechanism for a drill signal, itsbreak wheel 39 is moved by any well known means (not shown) to operate its signaling levers 37 and 38, the mechanism of the selecting device remaining in the position shown. Upon each break of the normal closed circuit, magnet 23 will release its armature to move contact levers 25, 27, 30 and 32 to establish the following circuits :(1) from junction 15, through conductor 18, lever 27, point 28, conductor 53, the bells 51 in the alarm loop in series, conductor 43, selecting device studs 49 and switch arms 46 in series in conductor 43, resistance 44, to junction 42, where this circuit joins circuit (2), to ,be described; (2) from c1rcu1t (1) at lever 27, to point 29,

conductor 54, conductor 52, the bells 51 in the drill loop in series, conductor 45, selecting device studs 50 and switch arms 47 in series in conductor 45 to junction 42 where this circuit joins circuit (1), thence through conductor 41, lever 30, point 31, to conductor 21; (3) from junction 15, through conductor 16 and resistance 17 therein, point 26, lever 25, conductor 34, transmitting mechanism 35, conductor 36 to signaling lever 37 of the operated station, signaling lever 38 thereat (now open here), conductor 40, magnet 23, conductor 55, to conductor 21; (4) from main 13. through resistance 58, trouble bell 57, conductor 56, point 33, lever 32, conductor 22, to main 12.

It will be seen that in circuit (1) the alarm loop is now connected tothe terminals of the source of energy with no intervening resistance except that of the line conductors. The current flow throughthis loop will now be greater than normal because high resistance magnet 23 and resistance 20 are no longer in series therewith. Resistance 44 in the alarm loop is such, however, that the current now flowing through this loop is insufiicient to operatively aflect the bell magnets. 1n circuit (2) the drill loop is now connected to the terminals of the source of energy with no intervening resistance except that of the line conductors. The bell magnets in this loop are their armatures are now effectively attracted to sound a stroke of the signal. As shown, the bell magnets are connected in series. If bellsof a standard resistance and intended for a standard current strength are used, it is evident that the number of them which should be connected in any drillbell loop depends upon the voltage .of the supply circuit. If the number of .bells required for the drill loop of any particular installation is not as great as the number corresponding to the supply voltage available, a balancing resistance may be inserted in conductor52. The closing of circuit (4) connects the trouble bell 57 in series with resistance 58 to the terminals of the source of energy E.

The resistance 58 may be used, as shown, to decrease the current through the trouble bell 57, or a high resistance trouble bell may be used if desired.

VVhen circuit (3) is closed by signaling levers 37 and 38, magnet 23' attracts its armature and restablishes the normal closed circuit. Upon further movement of breakwheel 39 this operation will be repeated, every interruption of the circuit at the signaling levers 37 and 38 causing the sounding of a stroke of the alarm upon the bells 51 in the drill loop.

It will be noticed that resistance 17 is included in circuit (3). This resistance may,

this circuit nected in series.

and switch 'arm 46 remaining in contact with stud 49. After this is done, the break wheel 39 may be operated in the usual manner. Upon each break of the circuit at the signaling levers 37 and 38, magnet 23 will release its-armature to move contact levers 25, 27, 30 and 32 to establish the following circuits :(1) from junction 15, through conductor 18, lever 27, point 28, conductor 53, the bells 51 in the alarm loop in series, conductor-43, selecting device studs 49 and switch arms 46 in series in conductor 43 to the operated selecting device, stud 49 thereat, to switch arm 47 thereat, where this circuit joins circuit (2), to be described; (2) from circuit (1) at lever 27, to conductor 54, conductor 52, the bells 51 in the drill loop in series, conductor 45, selecting device studs 50 and switch arms 47 in series in conductor 45 to the operated selecting device, to switch arm 47 thereat, where joins circuit (1), thence through switch arm 47, conductor 45, to junction 42, conductor 41, lever 30, point 31, to conductor; 21; (3), same as former circuit (3) (4), same as former circuit (4). Y

It will be seen that in the present circuit (1) the resistance 44 is short-circuited, so that the bells 51 in the alarm loop are now connected to the terminals of the source of energy with no intervening resistance except that of the line conductors. The bell magnets in this loop are so constructed and arranged that their armatures are now effectively attracted to sound a stroke of the signal. As shown, the bell magnets are con- If bells of a standard resistance and intended for a standard current strength are used, it is evident that the number of them which should be connected in any alarm bell loop depends upon the voltage of the supply circuit. If the number of bells required for the alarm loop of any particular installation is not as great as the number corresponding to the supply voltage available, a balancing resistance may be inserted in conductor 53.

As the present circuit (2) operatively corresponds with the former circuit (2), it will be seen that the bells in the drill loop will -.also sound a stroke of the signal.

. From the above it will be seen that the operation of a transmitting station may repoint 29,

sult either in'the sounding of an alarm upon the gongs of both the drill loop and the alarm loop, or upon the gongs of the drill. loop only, depending upon whether or not the resistance 44 is short circuited by any selecting device.

Inasmuch as many changes could be made in the above construction, and many apparently widely different embodiments ofmy invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following'claims is intended to cover all the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

I What .I claim and desire to secure by Letters Patent of the United States is 1. An electric signaling system comprising, a source of energy, two bell loops, a resistance in one of said loops, a station loop, means controlled by said station connecting said loops in series with each other and to the source of energy and for connecting said loops in parallel with each other and to the source of energy, and shortcircuiting means for said resistance controlled from each of a plurality of stations.

2. An electric signaling system comprising, a source of energy, two bell loops, a resistance in one of said loops, a station loop, means controlled by said station loop for connecting said loops in series with each other and to the source of energy and for connecting said loops in parallel with each other and to the source of energy, and means associated with each of a plurality of stations in said station loop for short-circuiting said resistance.

3. 'An electric signaling system comprising a bell loop, a resistance, and circuit changing devices for obtaining three different strengths of current in said bell loop, said devices comprising means for connecting said loops and said resistance in series, means for connecting said bell loop and said resistance in series therewith in parallel with the other loop, and means for connecting said loops in parallel and shortcircuiting said resistance.

4. An electric signaling system comprising a bell loop, a resistance, a plurality of other loops, and circuit changing devices for obtaining three different strengths of current in said bell loop, said devices comprising means for connecting said loops and said resistance in series, said bell loop .and said resistance in series therewith in parallel with the other loops,

loop for v another loop,

means for connecting and means for connecting said loops in parconnecting said loops and said resistance in allel and short-circuiting said resistance. series, means for connecting said second bell 10 5. In an electric signaling system, a staloop and said resistance in series therewith tion loop, a first bell loop, a second bell loop, in parallel With the station loop and the 5 a resistance in series therewith, and circuit first bell loop, and means for connecting said changing devices for obtaining three difierloops in parallel and short-circuiting said ent strengths of current in said second bell resistance. loop, said devices comprising means for I SIMON B. HESS. 

